CBSE Class 11 Engineering Graphics Syllabus 2026-27

ENGINEERING GRAPHICS Subject Code – 046 Class XI (2026-27)

Study of engineering graphics is defined as the set of graphic communication techniques used to convey the ideas, designs, concepts and information using proper standards. Since ages, professionals like Architects, Draftsmen, Surveyors, and even technocrats have been extensively using concepts and ideas of Engineering Graphics. The subject of 'Engineering Graphics' is an indispensable tool for all the branches of Engineering. This is necessary for the design, construction or analysis of machines, structures, and various systems even digitally. This subject is also useful for various designers like prototype designer, product designer, tool & die designer, apparel designer, footwear designer and interior designer. It is expected that the knowledge gained through the study of different topics and the skills acquired through the prescribed practical work will make the learners to meet the challenges of academic, professional courses and practical applications like design and development of vehicles, industrial products, aircrafts, dental implant fixtures, surgical planning of knee replacement etc. after studying the subject at Senior Secondary Stage.

Objectives:

The study of the subject of Engineering Graphics at Senior School Level aims at helping the learner to:

Develop clear concept and perception of different objects.

Reinforcing the related mathematical concepts.

Develop a clear understanding of plane geometry, solid geometry, and machine drawing to apply the same in relevant practical fields such as technology and industry.

Develop analytical, visual, and spatial skills.

Develop the skill of expressing two-dimensional and three-dimensional objects into professional language and vice versa.

• Acquire speed and accuracy in use of drawing instruments.

Acquire the ability to readily draw neat sketches, often needed in "On-job situations".

• Use digital technology (CAD) in designing and developing isometric and orthographic projections of simple objects.

COURSE STRUCTURE CLASS XI (2026-27)

One Paper (Theory): 3 Hours 70 Marks

One paper (Practical): 3 Hours 30 Marks

1. No. Unit Marks

PLANE GEOMETRY 10

1. Introduction
2. Lines, angles, and rectilinear figures
3. Circles, inscribing and circumscribing of circles

Ш SOLID GEOMETRY 30

1. Orthographic projection of points and lines
2. Orthographic projection of regular plane figures
3. Orthographic projection of right regular solids
4. Section of solids

Ш MACHINE DRAWING 30

1. Orthographic projections of simple machine blocks
2. Isometric projection of laminae (plane figures)

Practical 30

Total Marks 100

THEORY

I. PLANE GEOMETRY

Unit 1: Introduction: English alphabets (capital and small) and numerals in standard proportions; Unidirectional/aligned system of dimensioning and conventions as per SP 46:2003 (Revised); Engineering drawing instruments.

Unit 2: Construction of lines, angles, and their divisions. Simple questions based on triangles, square, rhombus, regular polygons-pentagon, and hexagon.

Unit 3: Construction of circles, inscribing and circumscribing of circles in equilateral triangle, square, rhombus, regular polygons-pentagon, and hexagon.

Introduction to Engineering Curves: Definition and applications of Ellipse, Parabola, Hyperbola, Involute, Helix, Cycloids and Sine Curve (FOR INTERNAL ASSESSMENT ONLY).

II. SOLID GEOMETRY

Unit 4: Orthographic projection: dimensioning and conventions strictly as per SP 46:2003 (Revised). Orthographic projection of points and lines.

Unit 5: Orthographic projection of regular plane figures - triangle, square, pentagon, hexagon, circle, and semi-circle.

Unit 6: Orthographic projection of right regular solids such as cube; prisms and pyramids (triangular, square, pentagonal, and hexagonal); cone; cylinder; sphere; hemi-sphere; frustum of pyramids and cone, when they are kept with their axis (a) perpendicular to HP/VP (b) parallel to HP and VP both.

Unit 7: Section of right regular solids such as cubes; prisms and pyramids (square, triangular, pentagonal, and hexagonal); cones; cylinders; spheres, kept with their axis perpendicular to HP/VP, made by a vertical cutting plane.

III. MACHINE DRAWING

Unit 8: Orthographic projection of simple machine blocks.

Unit 9: Isometric Projection - Construction of isometric scale showing main divisions of 10 mm and smaller divisions of 1 mm each. Isometric projection (drawn to isometric scale) of regular plane figures - triangle, square, pentagon, hexagon, circle, and semi-circle with their surface parallel to HP or VP (keeping one side either parallel or perpendicular to HP/VP).

Isometric View (drawn to full size scale) of regular plane figures (FOR INTERNAL ASSESSMENT ONLY)

PRACTICAL

1. Making different types of graphic designs/murals for interior/exterior decorations in colour using the knowledge of geometrical figures or 3D solids with the use of any Computer Software such as CollabCAD or any equivalent pertinent software.
2. Drawing the following engineering curve through activities - ellipse (by trammel & thread method) on the ground/drawing sheet/plywood/ cardboard etc.
3. Developing the following solids with the help of cardboard/ thick paper.
4. cube, cuboid
5. prisms & pyramids (triangular, square, pentagonal, and hexagonal)
6. right circular cylinder and cone
7. Preparing the section of solids (prisms, pyramids, sphere, etc.) with clay, soap- cake, plasticine, wax or with the 3D printing technology. When the cutting plane is: parallel to the base, perpendicular to the base or inclined to the base.

1. Preparing the top-view (plan) of a class-room/lab, home (Drawing Room/Bedroom/ Study Room, Kitchen) drawing different objects therein.

Note:

Ι. 15 practical (minimum three each from aforementioned five points) are to be assessed.

1. In all the practical, drawing/sketching of the views should be incorporated and evaluated accordingly.
2. The scheme of evaluation is as follows:

1. Practical (2) 15 Marks
2. Drawing/ Sketch 05 Marks
3. Viva-voce 05 Marks
4. Sessional Work 05 Marks Total 30 Marks

ACTIVITY

Industrial Visits (Two) to any industry/manufacturing plant/higher educational institute to acquaint the students with the present - day methods & technology for better conceptual understanding.